Although introduced a few years ago now I’ve never got the hang of using tabs in Finder within Mac OS X. I’m just stuck in my ways – or I was, until I learned of a simple trick that somehow makes tabs useful.
All you have to do is hold down Cmd when clicking on a item (or folder) in the Finder left-hand sidebar, and it’ll immediately open that item (or folder) in a new tab. Alternatively, hold down Cmd when double-clicking any folder within Finder’s listing and it’ll open in a new tab.
This is pretty basic stuff for hard-core OS X fans – holding down Cmd while clicking has always opened a new folder in a new window of some kind – but coupled to the new tab system it seems to make more sense. Give it a try. You might find it changes the way you think about and use finder.